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廢舊電路板低溫改性研究
摘要： 介紹了電路板的組成和類型,重點(diǎn)研究了廢舊電路板在低溫狀態(tài)下沖擊強(qiáng)度、彎曲強(qiáng)度和剪切強(qiáng)度的改性變化.實(shí)驗(yàn)結(jié)果表明,沖擊強(qiáng)度和剪切強(qiáng)度在-30℃時(shí)變化明顯.在此基礎(chǔ)上進(jìn)行了粗碎實(shí)驗(yàn)和細(xì)碎實(shí)驗(yàn),先使用ZKB-2型雙輥式剪切破碎機(jī)將電路板破碎到20 mm×20 mm的塊狀,測試在低溫狀態(tài)下的功耗并計(jì)算其生產(chǎn)能力,在-30℃～-10℃范圍內(nèi),生產(chǎn)能力可提高約17%,再降低溫度會使產(chǎn)品質(zhì)量受到影響.然后使用R型沖擊破碎機(jī)對廢舊電路板進(jìn)行細(xì)碎實(shí)驗(yàn),將物料破碎到3 mm以下,并記錄在不同工況下的參數(shù).實(shí)驗(yàn)結(jié)果表明在-30℃左右平均功率下降得較快,冷卻5min對低溫改性最有利. Abstract： Introduce cryogenic grinding and the components of Printed Circuit Board (PCB). Study the low-temperature modification of PCB, including mechanical property to find the influence of the different low-temperature on impact strength, flexural strength, shear strength of PCB. Tests show that impact strength and shear strength of PCB change sharply at -30℃. Used ZKB-2 type double roll shear crusher to crush PCB to 20mm×20mm particle size, in a temperature range of -30℃～ -10℃, the product yield is 17% higher than room temperature, and much lower temperature may deteriorate the product quality of crusher. Used R type mill to grind sample to minus 3mm under different working condition, the average power is decrease in evidence at -30℃, freezing time for 5 minutes is best. 作 者： 周翠紅 路邁西 潘永泰 陳茂和 喬雪峰 ZHOU Cui-hong LU Mai-xi PAN Yong-tai CHEN Mao-he QIAO Xue-feng 作者單位： 周翠紅,喬雪峰,ZHOU Cui-hong,QIAO Xue-feng(北京石油化工學(xué)院環(huán)境工程系,北京,102617)路邁西,潘永泰,陳茂和,LU Mai-xi,PAN Yong-tai,CHEN Mao-he(中國礦業(yè)大學(xué)北京校區(qū)化學(xué)與環(huán)境工程學(xué)院,北京,100083)
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